Question

我的脚本有一个情况，希望你能帮助我找到根本原因。

在我下面的测试脚本中，我使用函数“root.after（1000，update_timeText）”在理论上每1000毫秒执行一次计数器“update_timeText”（每一秒）。

此功能还每秒更新一次显示1,2,3,4 ......的GUI。第一次执行完美工作，每秒执行一次“update_timeText”，每秒只执行一次GUI正确更新1,2,3,4，.....

但是，如果我停止计时并重新启动计数器，GUI每秒更新一次，但每秒显示1,3,5,7 ..... “有趣”的情况是，在现实中，循环运行了两次。如果我打印变量 timer [0] ，则此变量显示1,2,3,4 ....但由于函数“root.after（1000，update_timeText）”每隔一秒更新一次GUI，显示1,3,5,7。

现在，如果我再次停止时钟并重新启动，现在GUI将显示1,4,7,11,14 ....但实际中变量 timer [0] 计算1,2,3,4,5 ...但真的很快。

我的代码如下;希望有人可以帮助我解决这个问题

感谢您的光临。

    def update_timeText():
        global temp
        global degree_sign
        global temp_b
        global temp_c
        if (state):
            global timer
            timer [0] +=1
            if (timer[0] >= 60): ## timer [0] Seconds     
                timer[1] += 1
                timer[0]  = 0
            if (timer[1] >= 60):  ## timer [1] Minutes
                timer[2] += 1
                timer[1]  = 0
            if (timer[2] == 24):  ## timer [2] Hours    
                timer[2]  = 0
            timeString = pattern.format(timer[2], timer[1], timer[0])
            timeText.configure(text=timeString)
        root.after(1000, update_timeText)
    def update_temp():
        global timer
        global loga
        global temp
        global degree_sign
        global temp_b
        global temp_c
        global temp_alter
        if (timer[0] == 1):
            temp = a.read_holding_registers(17415, 1)
            temp_alter = a.read_holding_registers(1031, 1)
            temp_a = str(temp)
            temp_b = temp_a.replace("[", "").replace("]", "")
            temp_c = temp_b[:2]+'.'+temp_b[2:]
            if (temp_alter >= [40]):
                degree_sign= u'\N{DEGREE SIGN}'
                Label(text=(str(temp_c)) + degree_sign + "C",fg = "red", font=("Arial", 12)).place(x=210,y=443)
            if (temp_alter <= [39]):
                degree_sign= u'\N{DEGREE SIGN}'
                Label(text=(str(temp_c)) + degree_sign + "C",fg = "green", font=("Arial", 12)).place(x=210,y=443)
        if (timer[0] == 10 or timer[0] == 20 or timer[0] == 30 or timer[0] == 40 or timer[0] == 50 or timer[0] == 60):
            loga.write("Time Stamp : Hours " +(str(timer[2]))+" ; Minutes "+(str(timer[1]))+" ; Seconds "+(str(timer[0]))+"\n")
            loga.write("Temp Stamp : "+(temp_c) + degree_sign + "C"                             "\n")
        if (timer[1] == 1):
            end_time1 = datetime.now()
            endd1 =(end_time1.strftime("%A %d %b %y, %H:%M"))
            def pause():
                global state
                state = False
                global timer
                timer = [0, 0, 0, 0]
            pause()
            process = "PASSED" 
            Label(text="PASSED      ", fg = "green", font=("Arial", 12)).place(x=210,y=543)
            loga.write("==============================================\n")
            loga.write("My Company.                                   \n")
            loga.write("Assy PN   #: 00000-00 Rev. A                  \n")
            loga.write("Serial    #: N/A                              \n")
            loga.write("Start Date: "+str(startt)+"                   \n")
            loga.write("End Date  : "+str(endd1)+"                    \n")
            loga.write("Station   : TEST                              \n")
            loga.write("Status    : "+str(process)+"                  \n")
            loga.write("==============================================\n")
            loga.close() ##to close logfile
            write = a.write_single_register(8245, 3)
            time.sleep(0.050)
            write = a.write_single_register(7668, 3)
            time.sleep(0.050)
            connect_btna.config(state = NORMAL)
            start_btna.config(state = DISABLED)
            abort_btna.config(state = DISABLED)
        root.after(1000, update_temp)
    def start():
        global state
        state = True  
        ##Starting Set Profile
        write = a.write_single_register(8245, 1)
        ##Lock Door Enabled
        Label(text = "DOOR  LOCKED...     ",fg = "green", font=("Arial", 12)).place(x=210,y=343)
    start()
if status == "":
    messagebox.showinfo('Process App 1.00', "An Error has occurred, Please, restart the app. Click OK to continue")
    write = a.write_single_register(8245, 3)
    time.sleep(0.050)
    write = a.write_single_register(7668, 3)
    time.sleep(0.050)
    loga.write("An Error has accurred.....\n")
    write = a.close()
    sys.exit()
    root.destroy()
    quit()
if status == "Fail":
    messagebox.showinfo('Process App 0.00', "An Error has occurred, Please, restart the app. Click OK to continue")
    root.destroy()
    quit() 
def pause():
    global state
    state = False
def reset():
    global timer
    timer = [0, 0, 0]
    timeText.configure(text='00:00:00')
def exist():
    root.destroy()
timer = [0, 0, 0]
pattern = '{0:02d}'+" h "+' {1:02d}'+" m "+' {2:02d}'+" s "
timeText = tk.Label(text="00:00:00", font=("Tahoma", 12))
timeText.pack()
timeText.place_configure(x=210,y=393)
update_temp()
update_timeText()
root.mainloop()

Answer 1

在我的剧本分析之后，我发现属于没有正确嵌套的属性函数，这就是我所拥有的

        timeString = pattern.format(timer[2], timer[1], timer[0])
        timeText.configure(text=timeString)
    root.after(1000, update_timeText)

在我正确嵌套 root.after（1000，update_timeText）后，我的测试脚本正在运行并作为冠军运行。

        timeString = pattern.format(timer[2], timer[1], timer[0])
        timeText.configure(text=timeString)
        root.after(1000, update_timeText)

感谢所有人， F Casian

Python“root.after（1000，my_test）”。它每秒循环但两次循环

1 个答案: